sni_gpio.c revision 1.5
1 /* $NetBSD: sni_gpio.c,v 1.5 2020/03/25 19:03:44 nisimura Exp $ */ 2 3 /*- 4 * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Socionext SC2A11 SynQuacer GPIO driver 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: sni_gpio.c,v 1.5 2020/03/25 19:03:44 nisimura Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/device.h> 41 #include <sys/systm.h> 42 #include <sys/gpio.h> 43 #include <sys/kernel.h> 44 #include <sys/systm.h> 45 46 #include <machine/endian.h> 47 #include <sys/bus.h> 48 #include <sys/intr.h> 49 50 #include <dev/gpio/gpiovar.h> 51 #include <dev/fdt/fdtvar.h> 52 #include <dev/acpi/acpireg.h> 53 #include <dev/acpi/acpivar.h> 54 #include <dev/acpi/acpi_intr.h> 55 56 static int snigpio_fdt_match(device_t, struct cfdata *, void *); 57 static void snigpio_fdt_attach(device_t, device_t, void *); 58 static int snigpio_acpi_match(device_t, struct cfdata *, void *); 59 static void snigpio_acpi_attach(device_t, device_t, void *); 60 61 struct snigpio_softc { 62 device_t sc_dev; 63 bus_space_tag_t sc_iot; 64 bus_space_handle_t sc_ioh; 65 bus_addr_t sc_iob; 66 bus_size_t sc_ios; 67 void *sc_ih; 68 kmutex_t sc_lock; 69 struct gpio_chipset_tag sc_gpio_gc; 70 gpio_pin_t sc_gpio_pins[32]; 71 int sc_maxpins; 72 int sc_phandle; 73 }; 74 75 CFATTACH_DECL_NEW(snigpio_fdt, sizeof(struct snigpio_softc), 76 snigpio_fdt_match, snigpio_fdt_attach, NULL, NULL); 77 78 CFATTACH_DECL_NEW(snigpio_acpi, sizeof(struct snigpio_softc), 79 snigpio_acpi_match, snigpio_acpi_attach, NULL, NULL); 80 81 /* 82 * "DevelopmentBox" implementation 83 * DSW3-PIN1, DSW3-PIN2, DSW3-PIN3, DSW3-PIN4, 84 * DSW3-PIN5, DSW3-PIN6, DSW3-PIN7, DSW3-PIN8, 85 * PSIN#, PWROFF#, GPIO-A, GPIO-B, 86 * GPIO-C, GPIO-D, PCIE1EXTINT, PCIE0EXTINT, 87 * PHY2-INT#, PHY1-INT#, GPIO-E, GPIO-F, 88 * GPIO-G, GPIO-H, GPIO-I, GPIO-J, 89 * GPIO-K, GPIO-L, PEC-PD26, PEC-PD27, 90 * PEC-PD28, PEC-PD29, PEC-PD30, PEC-PD31 91 * 92 * DSW3-PIN1 -- what's "varstore" really this 93 * DSW3-PIN3 -- tweek PCIe bus implementation error toggle 94 * PowerButton (PWROFF#) can be detectable. 95 * 96 * 96board mezzanine 97 * i2c "/i2c@51221000" 98 * spi "/spi@54810000" 99 * gpio "/gpio@51000000" pinA-L (10-25) down edge sensitive 100 */ 101 static void snigpio_attach_i(struct snigpio_softc *); 102 static int snigpio_intr(void *); 103 104 static int 105 snigpio_fdt_match(device_t parent, struct cfdata *match, void *aux) 106 { 107 static const char * compatible[] = { 108 "socionext,synquacer-gpio", 109 "fujitsu,mb86s70-gpio", 110 NULL 111 }; 112 struct fdt_attach_args * const faa = aux; 113 114 return of_match_compatible(faa->faa_phandle, compatible); 115 } 116 117 static void 118 snigpio_fdt_attach(device_t parent, device_t self, void *aux) 119 { 120 struct snigpio_softc * const sc = device_private(self); 121 struct fdt_attach_args * const faa = aux; 122 prop_dictionary_t dict = device_properties(self); 123 const int phandle = faa->faa_phandle; 124 bus_space_handle_t ioh; 125 bus_addr_t addr; 126 bus_size_t size; 127 char intrstr[128]; 128 _Bool disable; 129 130 prop_dictionary_get_bool(dict, "disable", &disable); 131 if (disable) { 132 aprint_naive(": disabled\n"); 133 aprint_normal(": disabled\n"); 134 return; 135 } 136 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0 137 || bus_space_map(faa->faa_bst, addr, size, 0, &ioh) != 0) { 138 aprint_error(": unable to map device\n"); 139 return; 140 } 141 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 142 aprint_error(": failed to decode interrupt\n"); 143 goto fail; 144 } 145 sc->sc_ih = fdtbus_intr_establish(phandle, 146 0, IPL_VM, 0, snigpio_intr, sc); 147 if (sc->sc_ih == NULL) { 148 aprint_error_dev(self, "couldn't establish interrupt\n"); 149 goto fail; 150 } 151 152 aprint_naive("\n"); 153 aprint_normal(": GPIO controller\n"); 154 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 155 156 sc->sc_dev = self; 157 sc->sc_phandle = phandle; 158 sc->sc_iot = faa->faa_bst; 159 sc->sc_ioh = ioh; 160 sc->sc_iob = addr; 161 sc->sc_ios = size; 162 163 snigpio_attach_i(sc); 164 165 /* dig FDT description to show 32 of GPIO line usage */ 166 167 return; 168 fail: 169 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios); 170 return; 171 } 172 173 static int 174 snigpio_acpi_match(device_t parent, struct cfdata *match, void *aux) 175 { 176 static const char * compatible[] = { 177 "SCX0007", 178 NULL 179 }; 180 struct acpi_attach_args *aa = aux; 181 182 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 183 return 0; 184 return acpi_match_hid(aa->aa_node->ad_devinfo, compatible); 185 } 186 187 static void 188 snigpio_acpi_attach(device_t parent, device_t self, void *aux) 189 { 190 struct snigpio_softc * const sc = device_private(self); 191 struct acpi_attach_args *aa = aux; 192 ACPI_HANDLE handle = aa->aa_node->ad_handle; 193 bus_space_handle_t ioh; 194 struct acpi_resources res; 195 struct acpi_mem *mem; 196 struct acpi_irq *irq; 197 ACPI_STATUS rv; 198 char *list; 199 200 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 201 &res, &acpi_resource_parse_ops_default); 202 if (ACPI_FAILURE(rv)) 203 return; 204 mem = acpi_res_mem(&res, 0); 205 irq = acpi_res_irq(&res, 0); 206 if (mem == NULL || irq == NULL || mem->ar_length == 0) { 207 aprint_error(": incomplete resources\n"); 208 return; 209 } 210 if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0, 211 &ioh)) { 212 aprint_error(": couldn't map registers\n"); 213 return; 214 } 215 sc->sc_ih = acpi_intr_establish(self, 216 (uint64_t)(uintptr_t)aa->aa_node->ad_handle, 217 IPL_VM, false, snigpio_intr, sc, device_xname(self)); 218 if (sc->sc_ih == NULL) { 219 aprint_error_dev(self, "couldn't establish interrupt\n"); 220 goto fail; 221 } 222 223 sc->sc_dev = self; 224 sc->sc_iot = aa->aa_memt; 225 sc->sc_ioh = ioh; 226 sc->sc_ios = mem->ar_length; 227 228 snigpio_attach_i(sc); 229 230 /* dig _DSD property to show 32 of GPIO line usage */ 231 rv = acpi_dsd_string(handle, "gpio-line-names", &list); 232 if (ACPI_SUCCESS(rv)) 233 aprint_normal_dev(self, "%s\n", list); 234 235 acpi_resource_cleanup(&res); 236 return; 237 fail: 238 acpi_resource_cleanup(&res); 239 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios); 240 return; 241 } 242 243 static void 244 snigpio_attach_i(struct snigpio_softc *sc) 245 { 246 struct gpio_chipset_tag *gc; 247 struct gpiobus_attach_args gba; 248 249 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM); 250 sc->sc_maxpins = 32; 251 252 /* create controller tag */ 253 gc = &sc->sc_gpio_gc; 254 gc->gp_cookie = sc; 255 gc->gp_pin_read = NULL; /* AAA */ 256 gc->gp_pin_write = NULL; /* AAA */ 257 gc->gp_pin_ctl = NULL; /* AAA */ 258 gc->gp_intr_establish = NULL; /* AAA */ 259 gc->gp_intr_disestablish = NULL; /* AAA */ 260 gc->gp_intr_str = NULL; /* AAA */ 261 262 gba.gba_gc = gc; 263 gba.gba_pins = &sc->sc_gpio_pins[0]; 264 gba.gba_npins = sc->sc_maxpins; 265 266 (void) config_found_ia(sc->sc_dev, "gpiobus", &gba, gpiobus_print); 267 } 268 269 static int 270 snigpio_intr(void *arg) 271 { 272 return 1; 273 } 274
Indexes created Tue Sep 30 11:09:46 GMT 2025